The main characters are, of course, Ariel and Baby Melody. Ariel is a mermaid known for her curiosity about the human world. Baby Melody is Ariel's daughter, who has her own charm and inquisitiveness.
Perhaps a plot where Baby Melody gets lost, and Ariel has to search for her all over the ocean. Along the way, Ariel meets different friends and foes, and through her determination, she finally finds Melody. It could show the strong bond between them.
Sure. One popular 'Ariel and Melody fanfic' might be 'Ariel's Legacy for Melody' which explores how Ariel imparts her wisdom to Melody. It has some really nice character development and beautiful descriptions of their underwater world.
Their baby could look very much like a normal human baby at first glance, but on closer inspection, it has some mermaid - like qualities. For example, its ears might be slightly pointed like Ariel's, and when it's in the water, it seems to move with an unusual grace. It has a beautiful face with a combination of Ariel and Eric's best features, and its skin has a soft, almost iridescent sheen in certain lights.
Lucia is often very popular. Her kind heart and strong singing ability make her a favorite. Fans love to write about her adventures as a baby mermaid, perhaps how she first discovers her love for singing and how it connects her to the magic of the mermaid world.
A human noble who doesn't approve of Ariel and Eric's union and especially doesn't like the idea of a half - human, half - mermaid baby. This noble could try to create problems for the family, like spreading false rumors or trying to get the baby separated from its parents. Another possibility is a sea monster that has been awakened by the birth of the baby, seeing it as an intrusion in its territory and trying to harm the baby and its parents.
Another plot could be centered around a baby mermaid getting lost. The other mermaid babies then embark on an adventure to find their friend, encountering various challenges along the way like dangerous currents and unfriendly sea monsters. This could also be a chance for them to learn about teamwork and friendship.
Maybe the plot involves the baby getting kidnapped by an evil sea witch who wants to use the baby's unique heritage for her own dark purposes. Ariel and Eric then embark on a dangerous adventure to rescue their baby. Along the way, they meet various sea creatures and humans who either help or hinder them. In the end, they manage to save their baby through their combined strength and love.
One idea could be that Ariel and Eric are taking their baby on a magical underwater tour to introduce it to all of Ariel's friends in Atlantica. Another could be the baby showing signs of having both human and mermaid/merman powers and Ariel and Eric trying to figure out how to help the baby control them. Maybe there's a plot where an old enemy of Ariel's resurfaces and they have to protect their baby from this threat.